The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1998
Filed:
Jun. 21, 1996
Scott Cameron McLeod, Oro Valley, AZ (US);
Delco Electronics Corporaiton, Kokomo, IN (US);
Abstract
A very fast circuit for tracking an input signal and holding the value for digitization comprises a holding capacitor, two charging circuits connected to either side of the capacitor and extending between a constant current generator and a supply voltage. Each charging circuit has an input transistor responsive to an analog input signal and a load including the capacitor, as well as a series switching transistor responsive to a sample signal to permit a tracking mode or forcing a hold mode. The load includes a diode to effect a low resistance during the tracking mode when the capacitor is charging and a very high resistance during the hold mode when the capacitor is discharging.